Term | Definition |
respiratory system | exchange oxygen from the air with C02 from the blood |
nasal cavity | generally the first entrance of air into the chest cavity |
warmed and filtered | two things which happen to the air upon entering the nasal cavity |
mucous membrane | secretes sticky mucus that traps dust particles and other foreign substances found in the air |
pharynx and larynx | the passageway of air after leaving the nasal cavity |
trachea | the windpipe |
right and left bronchi | what the trachea branches into |
bronchus | singular for bronchi |
bronchi | allows the air to enter the two lungs |
thoracic cavity | houses the two lungs |
right lung | slightly larger than the left |
three lobes | associated with the right lung only |
two lobes | associated with the left lung only |
pleura | the slippery membrane covering the lungs |
16 breaths per minute | average number of breaths for most normal humans |
number of alveoli | consists of about 300 million of these tiny air sacs |
function of the alveoli | allow for the exchange of oxygen and carbon dioxide between your blood and the air |
what happens when you inhale? | air enters the aveoli |
oxygen's movement | from the alveoli into the surrounding blood capillaries and carried by the blood to every part of the body |
carbon dioxide movement | from the body cells is released from the blood into the alveoli and travels up your respiratory tubes as you exhale |
diaphram | the muscle that helps you breath by contracting to create more space in your thoracic cavity |
phrenic nerve | signals the diaphragm muscle to contract |